/*
 * Baseboard.java 13 mai 2015
 *
 * Sweet Home 3D, Copyright (c) 2015 Emmanuel PUYBARET / eTeks <info@eteks.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package com.eteks.sweethome3d.model;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/**
 * A baseboard associated to wall.
 * @author Emmanuel Puybaret
 */
public class Baseboard implements Serializable
{
	private static final long serialVersionUID = 1L;
	
	private final float thickness;
	private final float height;
	private final Integer color;
	private final HomeTexture texture;
	
	private static final List<WeakReference<Baseboard>> baseboardsCache = new ArrayList<WeakReference<Baseboard>>();
	
	/**
	 * Creates a baseboard.
	 */
	public Baseboard(float thickness, float height, Integer color, HomeTexture texture)
	{
		this(height, thickness, color, texture, true);
	}
	
	private Baseboard(float thickness, float height, Integer color, HomeTexture texture, boolean cached)
	{
		this.height = height;
		this.thickness = thickness;
		this.color = color;
		this.texture = texture;
		
		if (cached)
		{
			baseboardsCache.add(new WeakReference<Baseboard>(this));
		}
	}
	
	/**
	 * Reads properties and updates cache.
	 */
	private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException
	{
		in.defaultReadObject();
		
		baseboardsCache.add(new WeakReference<Baseboard>(this));
	}
	
	/**
	 * Returns an instance of this class matching the given parameters.
	 */
	public static Baseboard getInstance(float thickness, float height, Integer color, HomeTexture texture)
	{
		Baseboard baseboard = new Baseboard(thickness, height, color, texture, false);
		for (Iterator<WeakReference<Baseboard>> it = baseboardsCache.iterator(); it.hasNext();)
		{
			WeakReference<Baseboard> ref = it.next();
			Baseboard cachedBaseboard = ref.get();
			if (cachedBaseboard == null)
			{
				it.remove();
			}
			else if (cachedBaseboard.equals(baseboard))
			{
				return baseboard;
			}
		}
		baseboardsCache.add(new WeakReference<Baseboard>(baseboard));
		return baseboard;
	}
	
	/**
	 * Returns the thickness of this baseboard.
	 */
	public float getThickness()
	{
		return this.thickness;
	}
	
	/**
	 * Returns the height of this baseboard. 
	 */
	public float getHeight()
	{
		return this.height;
	}
	
	/**
	 * Returns the color of this baseboard.
	 */
	public Integer getColor()
	{
		return this.color;
	}
	
	/**
	 * Returns the texture of this baseboard.
	 */
	public HomeTexture getTexture()
	{
		return this.texture;
	}
	
	/**
	 * Returns <code>true</code> if this baseboard is equal to <code>object</code>.
	 */
	@Override
	public boolean equals(Object object)
	{
		if (object instanceof Baseboard)
		{
			Baseboard baseboard = (Baseboard) object;
			return baseboard.thickness == this.thickness && baseboard.height == this.height
					&& (baseboard.color == this.color || baseboard.color != null && baseboard.color.equals(this.color))
					&& (baseboard.texture == this.texture
							|| baseboard.texture != null && baseboard.texture.equals(this.texture));
		}
		return false;
	}
	
	/**
	 * Returns a hash code for this baseboard.
	 */
	@Override
	public int hashCode()
	{
		int hashCode = Float.floatToIntBits(this.thickness) + Float.floatToIntBits(this.height);
		if (this.color != null)
		{
			hashCode += this.color.hashCode();
		}
		if (this.texture != null)
		{
			hashCode += this.texture.hashCode();
		}
		return hashCode;
	}
}
